Access to the terminal server through the second router

Good day, guys!
I have a question. There is a combined network mikrotik. Between the routers the VPN channel over the EOIP. EOIP in bridge with LAN.
I need to have access to the terminal server via the second router. Recall what needs to be done in routers?

I think, that this is what you are looking for:
https://wiki.mikrotik.com/wiki/Manual:RoMON

Why do I ROMON??? I need the external address of the second router to connect to a terminal server behind the first router

Then I misunderstood what you are trying to achieve.

Then you simply need to create port forwarding NAT rules:
https://wiki.mikrotik.com/wiki/Tips_and_Tricks_for_Beginners_and_Experienced_Users_of_RouterOS#Port_forwarding_on_RouterOS

More precisely I need. Using the second router to access the terminal server, which is located behind another router. I recall the routers united VPN tunnel.
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You have been given the receipe:

  1. make port forwarding from external router to the internal one treating it as virtual “terminal server”
  2. on the internal router make port forwarding to real terminal server

The second router has prescribed this is the rule:

add action=dst-nat chain=dstnat disabled=yes dst-port=624 protocol=tcp src-address-list=white to-addresses=192.168.1.1 to-ports=624

The rule works, but on the first router I do not understand what rule to prescribe to work. Standard port forwarding is not working. What do I have to register on the first router to work?